The diurnal fluctuation in the ground‐water and flow of the Santa Ana River and its meaning

Eos, Transactions, American Geophysical Union



In the time alloted for this subject it will be impossible to discuss, in its entirety, all phases of the methods used in computing the loss of water by transpiration from native plant‐life along the Santa Ana River. The results of this work are published in Bulletin 44 of the Division of Water Resources, State of California. The present paper is confined to a discussion of the diurnal fluctuations that occur in the flow of the Santa Ana River and the adjacent ground‐water.

On Figure 1 have, been plotted the gage‐height records for a short period (July 5–8, 1935) for eight southern California streams. These records have been selected at random from the large number of records filed in the local office of the United States Geological Survey. Some of these streams have a large drainage‐area, others are small; some are short and steep, others flat and long. The points of measurement range from 15 to 2950 feet above sea‐level. One of the streams (Mojave River) is in the desert‐region; the others drain into the Pacific Ocean. The object of Figure 1 is to demonstrate, that the diurnal fluctuation exists and is, to a large degree, similar at most points of measurement. As a rule, the maximum discharge occurs about 10 o'clock in the morning, and the minimum late in the afternoon. It is readily recognized that these fluctuations are in the main caused by the evaporation and transpiration‐loss in or adjacent to the stream‐channel.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title The diurnal fluctuation in the ground‐water and flow of the Santa Ana River and its meaning
Series title Eos, Transactions, American Geophysical Union
DOI 10.1029/TR017i002p00496
Volume 17
Issue 2
Year Published 1936
Language English
Publisher American Geophysical Union
Description 9 p.
First page 496
Last page 504
Country United States
State California
Other Geospatial Santa Ana River
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